# Scrapy settings for lyl project
#
# For simplicity, this file contains only settings considered important or
# commonly used. You can find more settings consulting the documentation:
#
#     https://docs.scrapy.org/en/latest/topics/settings.html
#     https://docs.scrapy.org/en/latest/topics/downloader-middleware.html
#     https://docs.scrapy.org/en/latest/topics/spider-middleware.html

BOT_NAME = 'lyl' #Scrapy项目的名字

SPIDER_MODULES = ['lyl.spiders']
NEWSPIDER_MODULE = 'lyl.spiders'

USER_AGENT= 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.66 Safari/537.36'#设置头部假装浏览器
LOG_LEVEL = 'ERROR'#可以看到错误信息
# Crawl responsibly by identifying yourself (and your website) on the user-agent
#USER_AGENT = 'lyl (+http://www.yourdomain.com)'

# Obey robots.txt rules，修改是否遵守爬虫协议为False
ROBOTSTXT_OBEY = True#看爬取网站在不在

#Configure maximum concurrent requests performed by Scrapy (default: 16)
# 修改并发请求数，修改为1，或者2，越小爬取速度越慢，太快容易被识别到
CONCURRENT_REQUESTS = 32

# Configure a delay for requests for the same website (default: 0)
# See https://docs.scrapy.org/en/latest/topics/settings.html#download-delay
# See also autothrottle settings and docs
# 修改下载延迟时间，DOWNLOAD_DELAY设置越大请求越慢
DOWNLOAD_DELAY = 0
# DOWNLOAD_DELAY = 3
# The download delay setting will honor only one of:
# 多线程进行数据请求
CONCURRENT_REQUESTS_PER_DOMAIN = 16#对单个网站进行并发请求的最大值。
CONCURRENT_REQUESTS_PER_IP = 16

#禁用Cookie（默认情况下启用）
# Disable cookies (enabled by default)
# 大部分情况下禁止使用Cookies可以防止被ban
COOKIES_ENABLED = False

# Disable Telnet Console (enabled by default)
#TELNETCONSOLE_ENABLED = False

# Override the default request headers:
#DEFAULT_REQUEST_HEADERS = {
#   'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
#   'Accept-Language': 'en',
#}


#启用或禁用蜘蛛中间件
# Enable or disable spider middlewares
# See https://docs.scrapy.org/en/latest/topics/spider-middleware.html
#SPIDER_MIDDLEWARES = {
#    'lyl.middlewares.LylSpiderMiddleware': 543,
#}

#启用或禁用下载器中间件
# Enable or disable downloader middlewares
# See https://docs.scrapy.org/en/latest/topics/downloader-middleware.html
# DOWNLOADER_MIDDLEWARES = {
#    'lyl.middlewares.LylDownloaderMiddleware': 543,
# }

#启用或禁用扩展程序
# Enable or disable extensions
# See https://docs.scrapy.org/en/latest/topics/extensions.html
#EXTENSIONS = {
#    'scrapy.extensions.telnet.TelnetConsole': None,
#}

#配置项目管道
# Configure item pipelines
# See https://docs.scrapy.org/en/latest/topics/item-pipeline.html
ITEM_PIPELINES = {
   'lyl.pipelines.LylPipeline': 300,
}
##300是优先级 字典 数字小优先级越高
# Enable and configure the AutoThrottle extension (disabled by default)
# See https://docs.scrapy.org/en/latest/topics/autothrottle.html
# AUTOTHROTTLE_ENABLED = True

#初始下载延迟
# The initial download delay
AUTOTHROTTLE_START_DELAY = 0#延迟
# The maximum download delay to be set in case of high latencies
#AUTOTHROTTLE_MAX_DELAY = 60
# The average number of requests Scrapy should be sending in parallel to
# each remote server
#AUTOTHROTTLE_TARGET_CONCURRENCY = 1.0
# Enable showing throttling stats for every response received:
#AUTOTHROTTLE_DEBUG = False

# Enable and configure HTTP caching (disabled by default)
# See https://docs.scrapy.org/en/latest/topics/downloader-middleware.html#httpcache-middleware-settings
#HTTPCACHE_ENABLED = True
#HTTPCACHE_EXPIRATION_SECS = 0
#HTTPCACHE_DIR = 'httpcache'
#HTTPCACHE_IGNORE_HTTP_CODES = []
#HTTPCACHE_STORAGE = 'scrapy.extensions.httpcache.FilesystemCacheStorage'
